What is the primary purpose of a digital multimeter?

The primary purpose of a digital multimeter is to measure voltage, current, and resistance, making it a versatile tool for electrical work and diagnostics. This capability allows technicians to perform a variety of measurements, which are essential for troubleshooting and verifying electrical circuits.

In practical applications, measuring voltage enables users to determine the potential difference across components, which is crucial for checking circuit functionality. Measuring current helps assess how much electricity is flowing through a circuit, which can be pivotal in evaluating load conditions or identifying overloads. Measuring resistance is key in checking for short circuits, open circuits, or verifying component integrity, such as ensuring that a resistor is functioning properly.

The other options are limited in scope and do not encompass the full range of functionality that a digital multimeter provides. By integrating all these measurement capabilities, a digital multimeter is an essential tool for electricians and technicians in various settings.